Why my screen is garbled with bad pixels

The text for Mozilla (no other programs) is wrong to pixels. Some areas where it is supposed to be a part of the text is white, and some areas that are supposed to be white have other pixels of color.

It remains like that, even when scrolling. But if I mark the text and then clear the option, this area is fixed.

I can send a screen shot or two, but I don't see how to send attachments.

Thank you very much. It works fine now.

Tags: Firefox

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